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    • 2. 发明公开
    • 셀룰러폰의 무선양방향 핸즈프리
    • 无线双向手机无线电话包
    • KR1020030089277A
    • 2003-11-21
    • KR1020020027427
    • 2002-05-17
    • 주식회사 에이엠지테크놀러지
    • 유인기장수범
    • H04B1/38
    • H04M1/6066
    • PURPOSE: A wireless bidirectional hands-free kit for a cellular phone is provided to apply a multi-chip module to various circuits, and to separate a transmitter, a receiver, and a controller from one another, thereby removing interference caused by parasitic propagation. CONSTITUTION: A receiving unit consists of the first preamplifier(33), a mixer(34), the second intermediate frequency amplifier(36), and an oscillator(44) through a duplexer(31), and is installed with serial/parallel resistors, coils, capacitors, and low frequency transistors as a multi-chip module. A transmitting unit consists of an audio amplifier(22), a microphone controller(21), a modulation unit(24), RF amplifiers(26,28), a local oscillator(25), and bandwidth filters(27,29) through the duplexer(31), and is installed with serial/parallel resistors, coils, capacitors, and low frequency transistors as a multi-chip module. A controller controls data input/output with level outputs, and controls microphone on/off operations.
    • 目的:提供用于蜂窝电话的无线双向免提套件,以将多芯片模块应用于各种电路,并将发射机,接收机和控制器彼此分离,从而消除由寄生传播引起的干扰。 构成:接收单元由第一前置放大器(33),混频器(34),第二中频放大器(36)和通过双工器(31)的振荡器(44)组成,并且安装有串行/并行电阻器 ,线圈,电容器和低频晶体管作为多芯片模块。 传输单元包括音频放大器(22),麦克风控制器(21),调制单元(24),RF放大器(26,28),本地振荡器(25)和带宽滤波器(27,29) 双工器(31),并且安装有串行/并联电阻器,线圈,电容器和低频晶体管作为多芯片模块。 控制器通过电平输出控制数据输入/输出,并控制麦克风开/关操作。